Streptococci are unable to synthesize which enzyme?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for your Microbiology exam with engaging quizzes and comprehensive questions. Review essential concepts in Clinical Laboratory Science to ensure your success. Get ready for your exam!

Multiple Choice

Streptococci are unable to synthesize which enzyme?

Explanation:
Streptococci are catalase-negative, meaning they do not produce the enzyme catalase that breaks down hydrogen peroxide into water and oxygen. In the lab, a catalase test is used to distinguish these organisms from Staphylococcus, which are catalase-positive and bubble vigorously when hydrogen peroxide is added. The absence of bubbles indicates catalase negativity, a hallmark of streptococci. The other enzymes listed—kinase, hyaluronidase, and lipase—are not universal traits of streptococci and vary among species, so they’re not reliable identifiers for the genus.

Streptococci are catalase-negative, meaning they do not produce the enzyme catalase that breaks down hydrogen peroxide into water and oxygen. In the lab, a catalase test is used to distinguish these organisms from Staphylococcus, which are catalase-positive and bubble vigorously when hydrogen peroxide is added. The absence of bubbles indicates catalase negativity, a hallmark of streptococci. The other enzymes listed—kinase, hyaluronidase, and lipase—are not universal traits of streptococci and vary among species, so they’re not reliable identifiers for the genus.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy